Problem with Layer Slider

Hi,

I’m working in a new site with your Theme. I downloaded the main Demo and all plug-ins but the layer slider is not working… it has no layers… It appear the following notice:

“LayerSlider encountered a problem while it tried to show your slider.
Please make sure that you’ve used the right shortcode or method to insert the slider, and check if the corresponding slider exists and it wasn’t deleted previously.”

If I check the Layers… there is no one there 🙁

How can I get the them?

Thank you!!!
Paula